Figure



March 24, 1964 R. s. KENlN ETAL 3,125,802

METHOD OF REMOVING A DISC-LIKE .CLOSURE FROM A CORE! Filed Nov. 27, 1961 1.5 11 y 2 Fi .1

l' Z 4 v INVENTORS.

Ru6se// 5. ken in Robert Woody United States Patent 3,125,802 MEQD 0F REMGVING A DISC-L CLOSURE FROM A CORE Russell S. Kenin, Midland, and Robert Woody, Bay City,

Mich assign'ors to The Dow Chemical Company, Midland, Mich, a corporation of Delaware Filed Nov. 27, 1961, Ser. No. 154,996 1 Claim. (til. 29-427) This invention relates to an improved method of removing an insert of the type used to reduce the efiective inner diameter of thin walled cylindrical cores on which paper, thread, yarn, tape, or the like are wound, from the core.

Thread, yarn, and like generally filamentary articles are often wound on a core made of paper or cardboard :for convenience in handling and processing. The core is usually a hollow cylinder having walls which are thin relative to the core diameter. Frequently in dispensing the wound material, the core is placed over a fixed spindle and the core rotates as the generally filamentary material is drawn away. Material is drawn from the package usually in a direction about tangential to the circumference of the package and approximately perpendicular to the longitudinal axis thereof. A substantial proportion of machinery uses spindles of a diameter considerably smaller than the inner diameter of the core. The ditcference between the spindle diameter and the inner core diameter is a factor which often causes the yarn or tape package to wobble as material is drawn from the package. In a weaving process, for example, uneven tension on the thread or yarn coming from the wobbling package when transmitted to a shuttle, spool or bobbin, usually gives a poor non-uniform fabric as a final product. Particularly when high speed operation is desired, wobble generally causes highly unsatisfactory results.

It is generally both impractical and undesirable to increase the size of the spindle to fit the core. Further, to reduce the inner diameter of the core, because of its thin walled construction, would also reduce the outer diameter of the core. Such a reduction would highly increase the rotational speed of the package if a constant linear speed of withdrawing material is maintained, particularly as the end or": the material at the core is approached. In order to produce a core having a sufiiciently large outer diameter and a small inner diameter, thick walled construction would be required. The cost of such a core would be prohibitive in most operations.

To reduce the eiiective inner diameter of the core without changing the outer diameter, a disc shaped insert is generally placed in each end of the core. The disc shaped insert may be fabricated from metal, plastic, or other suitable material, and defines a centrally disposed circular aperture of a diameter at least as large as that of the spindle on which the package is to be used. To insure a tight fit between core and insert, the insert is generally of a diameter such that it is a friction fit for the end of the core. In position, the major surfaces of the insert are at right angles to the longitudinal'axis of the core. When the package is emptied, the inserts are removed from the core so that they can be used again in other package cores.

Removal of the insert presents some inherent diificulties. If a speedy removal is desired, the paper core must usually be sacrificed by slitting with a sharp bladed instrument to release the insert. .Slitting may be a hazardous operation for operating personnel and results in the destruction of the core, which otherwise could usually be reused. Further, the package may not be fully used when it is removed from the spindle, as when a different colored material is to be put into the process. Slitting would not be practical as it would sacrifice the remaining yarn or thread as well as the core. Thus, it is most desirable that the insert be recovered without destruction of the core. To recover both the insert and the core according to prior art practice is a time consuming op- 'eration.

It is an object of this invention to provide an improved method of removing inserts used to reduce the effective inner diameter of cylindrical cores, so that both the inserts and the cores may be reused.

A further object of the invention is to provide rapid, safe and economical method of removing core inserts.

These objects and other benefits are accomplished in accordance with the invention by providing a hollow, cylindrical core having a tightly fitting disc-shaped insert positioned at each end of said core perpendicular to the longitudinal axis of the core so as to reduce the eflFective inner diameter of said core, each insert defining a centrally located aperture of the desired inner diameter and each insert also defining a pair of extraction apertures positioned along a diameter of the insert, said extraction apertures disposed on opposite sides of the centrally disposed aperture, and having axes generally parallel to and substantially equidistant from the longitudinal axis of said insert, and in cooperative combination therewith an insert remover having prongs of a size to enter the pair of extraction apertures, said prongs being so constructed and arranged as to engage and remove the insert when positioned in the extraction apertures and a rotational and pulling force is applied to the tool.

Other objects and advantages of the invention will become more apparent from the following specification :When taken in conjunction with the drawing wherein:

FIGURE 1 is an end view of a core having an insert therein.

FIGURE 2 is a longitudinal, axial, sectional view showing a core having positioned therein a pair of inserts.

FIGURE 3 is a plan view of the insert remover in accordance with the invention.

FIGURE 4 is a side view of the insert remover of FIGURE 3.

FIGURE 5 is a partial, longitudinal, axial, sectional view show-ing an insert positioned in a core.

In FIGURE 1 there is illustrated an end view of an insert 19 in accordance with the invention positioned within a core 11. The insert lit defines a centrally disposed apenture 12 adapted to engage a spindle, and a pair of extraction apertures 14 disposed along a diameter of the insert on opposite sides of aperture 12. The extraction apertures 14 have axes of generation disposed generally parallel to the axis of the centrally disposed aperture 12. The extraction apertures 1 are spaced so as not to significantly reduce the strength of the insert 10. The insert it) is friction fitted into the core 11 so as to engage an inner sunface 15 of said core 11.

in FIGURE 2 there is illustrated a longitudinal cross sectional view of the core 11 having insert 10 positioned in each end thereover. The central apertures 12 of the inserts 10 are subsequently coaxial with the core 11.

In FIGURE 3 there is depicted a plan view of a core insert remover generally designated by the reference numeral 16. The core remover consists of a handle portion 17 defining a pair of prongs 18 extended in spaced relationship generally parallel and normal therefrom. The terminal portions 1% of the prongs 18 each define a recess or notch 26 positioned remotely from the handle 17. A brace member 2d maintains the prongs 18 in rigid, spaced relationship.

In FIGURE 4 there is shown a side of the core insert remover 1a of FIGURE 3 wherein the position and relationship of the notches 26} are clearly set forth.

FIGURE depicts an alternative embodiment of the invention wherein a core 111 is provided with an insert 110 said insert having a centrally disposed aperture 112, a pair of extraction apertures 114 in spaced relationship and on opposite sides of the central disposed aperture.

The insert 110 comprises a discoidal portion 23 having a generally cylindrical wall 214 perpendicular to the discoidal portion 23, the wall having an outwardly extending flange 25 remote from said discoidal portion 23. The generally cylindrical portion 24 of the insert 1.10 is sized to frictionally engage the inner surface 115 of the core llli. The flange 25 is adapted to engage the end portion of the core 111 to prevent insertion of the insert beyond a predetermined distance.

Removal of the insert from the core 11 is eiiected by an insert remover such as is illustrated in FIGURES 3 and 4. The prongs 18 of the pulling device are generally parallel to each other and spaced about the same distance apart as the extraction apertures 14. The prongs 18 are of a size so as to enter said extraction apertures 14. In use, the prongs 1% are inserted into the extraction apertures 14 to a depth sufficient to position the notched portions 19 of the device adjacent to the inner edge of the extraction apertures 14. The hoolcs or notches 20 are on opposite sides of the prongs 18 facing perpendicular to the line between the prongs 18 of the device. The handle 17 is twisted so that the notches 2t} engage the inner edge of the extraction apertures 14, and with a pulling motion, the insert 10 is removed from the core 11. Beneficially, the pulling device 10, may be braced by means of a brace member 21 if additional rigidity is desired.

The shape of the handle is limited only to that which will permit a twisting-pulling force on the device. The notches 24) may be opposed so as to require either a clockwise or a counter clockwise twisting motion to engage the inner edge of the extraction apertures 14. Any strong rigid material may be used to form the pulling device. Instead of notches 2.0 as shown in FIG- URES 3 and 4, the material may be bent or shaped in opposite directions to form hooks or projections. All that is required is a configuration which will allow the pulling device to engage the inner edge of an insert, when twisted, so as to remove the insert when a pulling force is applied.

The embodiment of FIGURE 5 is a particular configuration which greatly facilitates positioning the insert perpendicular to the longitudinal axis of the core, but does not affect the basic operation of the removal means of this invention. In this embodiment, an insert 110 is formed as a disc-shaped tcup having a flat bottom 23 defining the apertures 11-2 and L14. The insert 110 has a cylindrical circumferential wall 24 perpendicular to the bottom 23. The edge of the insert Wall remote from the flat portion 23 is rolled outward to form flange 25 so that the insert will enter the core 111 only to the depth of the insert wall 24. The insert 110 is positioned within the core 111. As may be seen from FIGURE 5, the wall 24 prevents the insert from skewing, so that the flat,

disc-shaped portion of the insert is maintained at right 6 angles to the longitudinal axis of the core 111. The insert 1110 is force titted into the core 111 and its shape insures correct positioning therein.

By way of further illustration inserts having the form of the configuration illustrated in FIGURE 5 were fabricated from aluminum alloy by a stamping process. The outside diameter of the'insert was 1 inches and the cylindrical wall was of an inch high. The upper edge of the wall was rolled outward to form a flange ot an inch wide. The centrally disposed aperture had a diameter of /8 inch and the pair of extraction apertures had diametersnof 7 inch with their center 1 inch apart, equidistant from the centrally disposed aperture.

An insert remover was fashioned from inch steel rod in the shape illustrated in FIGURES 3 and 4. Bracing, as illustrated, was Welded between the prongs of the insert remover. Inserts thus-formed were used to reduce the inner core diameter of yarn packages. When the yarn was removed from the package the inserts were removed employing the insert remover of this invention. The insert remover of this invention effected a speedy, eflicient, safe means for removal of inserts. Both the cores and inserts were in good condition and were suitable for reuse after the inserts were removed from the cores. Such reuse was in fact accomplished, the inserts and cores being reused repeatedly.

Various modifications may be made in the present invention without departing from the spirit or scope thereof, and it is to be understood that we limit ourselves only as defined in the appended claim.

We claim:

In a method of disassembling a package having a core and a disc-like closure frictioned fitted at each end of said core, each said closure having a centrally disposed aperture whereby the effective inner diameter of said [core is reduced sufiicient-ly to accommodate but not to restrain rotation about a spindle, the improvement which comprises (a) providing each disc-like closure with a pair of extraction apertures positioned along a diameter of the disc, said extraction apertures disposed on opposite sides of the centrally disposed aperture and having axes generally parallel to and substantially equidistant from the longitudinal axis of the disc; (b) providing an insert remover having a handle from which project two spaced prongs, said prongs being in a single plane, the terminal portion of each prong remote from said handle being so constructed and arranged as to define a hook-like notch, said notch in one of said prongs facing on one side of said single plane and said notch in the other prong facing on the other side of said single plane; (0) passing the prongs of said insert remover into the pair of extraction apertures; (d) rotating the insert remover, thereby to engage the hook-like notch in each prong with the wall of each extraction aperture in the disc; and (e) exerting a pulling force on said insert remover thereby to remove and disassemble said disc-like closure from the package core.

References Cited in the file of this patent UNITED STATES PATENTS 959,693 Bailey May 31, 1910 2,223,682 Gammeter Dec. 3, 1940 2,364,953 Daley Dec. 12, 1944 FOREIGN PATENTS 602,921 Canada Aug. 2, 1960 

